Improvement jn core-boxes



' 'andState of Maryland, have invented a new foundry and-other purposes'wherecoresaref applicable; andI do hereby/.declare that the UNIT-Rn .STATES JOHN s; HARPER, Or BALTIMORE. MARYLAND.

. 1M PROVEM ENT; .I'NLOO RE-BOxE-s.

Specification f oiming p'art'of Letters Patent No.4 dgvdated Jnne 5, 1860.

TofLZZ whom, t may concern:

vBe it known that I, JOHN SA. HARPHRo-f Baltimore-city. in the count-y of Baltimore andusefnl improved adjustable box for the purpose of making cores out of drysand for following is a full and exact description of the saine, reference being had t0 the accompany ing drawings, and'making a part of the speciication, in which- Figure 1 is a cross-section, and Fig. 2 being a longitudinal section. y I construct, in theirst place, the body of my box of sheet-steel or any other elastic material, and form it into a circle or scroll form. I surroundthe outer surface with two or more bands, one edge of each band,l which is notched, -thereby constructing the gage, giving the exact diameter of thecore. When fastened in notch No. 4 in .said outer ban-d, as seen ou drawings, gives a'core of four inches in diaxneteluy By moving said band one notch forward, which will expand the aforementioned circular scroll of steel oriothel; elastic materv rialout'of which it may be mad-e, will enlarge the diameter, thereby makinga collie 'four and One-eighth inches in diameter; and thus by moving `back or -for.ward,: thereby expanding or contracting the circular scroll of steel, there can 'be any given'size core made2t'hat is'de'- sred.

The foregoing is a full and clear/description of my adjustable core-box.

What I claim as my inventi to cover by this caveat, is

A core-box which.' is capabl'of being expanded and contracted in diameter, in the manner described, by the use of two or more toothed bands with catches, and figured to. designate the size of core required, in connection with the open cylinder, or in anyothe'r waysubstantially the same, and which will produce the intended effect.

JOHN s. HARPER. Witnesses:

F. S. MYER, D. D. GILL.

on,'"and desire 

